♻️ split set_parent function

include/nlohmann/detail/conversions/to_json.hpp

@@ -132,7 +132,7 @@ struct external_constructor<value_t::array>
     {
         j.m_type = value_t::array;
         j.m_value = arr;
-        j.set_parent(j, true);
+        j.set_parents();
         j.assert_invariant();
     }
 
@@ -141,7 +141,7 @@ struct external_constructor<value_t::array>
     {
         j.m_type = value_t::array;
         j.m_value = std::move(arr);
-        j.set_parent(j, true);
+        j.set_parents();
         j.assert_invariant();
     }
 
@@ -154,7 +154,7 @@ struct external_constructor<value_t::array>
         using std::end;
         j.m_type = value_t::array;
         j.m_value.array = j.template create<typename BasicJsonType::array_t>(begin(arr), end(arr));
-        j.set_parent(j, true);
+        j.set_parents();
         j.assert_invariant();
     }
 
@@ -185,7 +185,7 @@ struct external_constructor<value_t::array>
         {
             std::copy(std::begin(arr), std::end(arr), j.m_value.array->begin());
         }
-        j.set_parent(j, true);
+        j.set_parents();
         j.assert_invariant();
     }
 };
@@ -198,7 +198,7 @@ struct external_constructor<value_t::object>
     {
         j.m_type = value_t::object;
         j.m_value = obj;
-        j.set_parent(j, true);
+        j.set_parents();
         j.assert_invariant();
     }
 
@@ -207,7 +207,7 @@ struct external_constructor<value_t::object>
     {
         j.m_type = value_t::object;
         j.m_value = std::move(obj);
-        j.set_parent(j, true);
+        j.set_parents();
         j.assert_invariant();
     }
 
@@ -220,7 +220,7 @@ struct external_constructor<value_t::object>
 
         j.m_type = value_t::object;
         j.m_value.object = j.template create<typename BasicJsonType::object_t>(begin(obj), end(obj));
-        j.set_parent(j, true);
+        j.set_parents();
         j.assert_invariant();
     }
 };